Hinge.



No. 772,119. I PATBNTBD 00T. 11, 1904.

'J. E. AHLVIN.

HINGE.

APPLICATION FILED 11111.19, 1904.

No MODEL. 2 SHEETS-SHEET 1.

WIN!

Patented October 11, 1904.

PATENT OEEICE.

-JOHN E. AHLVIN, 'OF JOLIET, ILLINOIS.

HINGEIl SPECIFICATIONfOrming part of Letters Patent No. 772,119, dated October 11, 1904.

Application filed March 19, 1904l To all whom, it may concern,.-

Beit known that I, JOHN E. AHLvIN, a citizen of the United States, residing at Joliet, in the county of Will and State of Illinois, have invented a new and useful 'Improvement in Hinges, of which the following is a specification.

My invention relates particularly to doors capable of swinging in two directions, such as butlers7 pantry-doors; and my primary oloject is to provide improved means whereby the door may be maintained in either of three positions.

My invention is illustrated in the accompanying drawings, in which- Figure 1 is a broken vertical sectional view illustrating the manner of hanging a door equipped with my improvement; Fig. 2, a section taken as indicated at line 2 of Fig. l; Fig. 3, a view in the nature of a development of a cam employed, which cam cooperates with a yieldingly-held roller to maintain the door in the closed position or in either of the two open positions; Fig. 4, an inner or front View of an improved'heel-plate for the door; Fig. 5, a plan section talren'as indicated at line 5 of Fig. 4E, and Fig. 6 a plan view of a floor-plate equipped with a cam.

In the construction illustrated, A represents the iioor; B, the jamb of the door-frame adjacent to the pivotal edge of the door; C, the swinging door; D, a floor plate equipped with a cam D; E, a heel-plate for the door; E', a bell-crank lever journaled therein and equipped with a roller E2, engaging the cam D; E, a lever acting upon the free arm of the bell-crank lever E', and E4L a tension device for the lever E3.

rIhe plate D is rectangular in shape and provided at its four corners with screw perforations d. Upon the upper surface of the plate is the cam D', which is of circular contour and provided at its front portion with a depression cl', corresponding with the closed position of the door, and provided at its diametrically-opposed side portions with depressions ZZ d3, corresponding with the two open positions of the door. At the central portion of the cam is a boss CZ* and a perforation As appears from Figs. 2 and 3, the front depression d has a long gently-declining surface Serial No. 199,005. (No model.)

d, up one or the other of which the roller E2 mounts when the door is swung open, depending upon which way the door is swung.

The heel-plateE comprises a vertical plate or member e and a bottom plate e, on the under surface of which bottom plate is a barrel e2, tting loosely over the circular cam D. The plate e is provided on its upper surface with fianges e3, which constitute metal bindings for the adjacent portion of the door. The vertical member e has at its l'ower edges forwardly or inwardly turned flanges or ribs e4, from the lower ends of which extend forwardly iianges @5, affording between them a chamber e6, which receives the bell-crank lever E. The plate e' is provided between the ianges e5 with a perforation e7, through which the cam-roller works. The front end (toward the free vertical edge of the door) of the plate e is pressed below the main portion of the plate, as appears from Figs. 1 and 4. At the center of the barrel e2 is a downwardly-projecting pivot es, which extends through the perforation Z5 of the floor-plate, and at the upper end of said pivot is a boss e9, which bears upon the boss e4 of the Hoor-plate. The heel-plate is secured to the floor-plate after inserltion of the pivot es by means of a cotterpm e The bell-crank lever E is supported at the junction of' its arms on a transverse pivot .e1-1. The forwardly-projecting arm of said lever has a downturned bifurcated extremity in which is journaled a roller E2 on a pivot e112, extending perpendicularly to the pivot cu. The lever E3 is supported centrally on a pivot @13, supported by the iianges eL of the vertical member of the heel-plate.

The tension device E4 comprises a barrel e, a nut @15, having a pnojection moving in a slot e in said barrel, a spring @17, and a threaded rod e, accessible for purposes of adjustment through perforations in the upper end of the lever E3 and the upper end of the member e of the heel-plate. p

It will be understood that in applying my improvements to a door the rear or lower edges of the door are properly mortised to receive the heel-plate and to accommodate the levers.

In operation the door swings upon the pivot IOO es, and a suitable pivot at the top of the door, (not shown,) and as the door swings the roller E2 rides upon the cam D. It will be understood, therefore, that when the door is in either of the extreme open positions, as indicated by the dotted lines at f and f of Fig. 6, the door will remain open, and when the door is open less than the full distancethe tendency is for the roller to seek the bottom of the depression CZ', therebyT bringing the door to the central or closed position. As

lappears from Fig. 2, the front end of the forwardly-projecting arm of the bell-crank lever E has a head which works snugly between the flanges e5 of the bottom member of the heel-plate, so that no iiexing strain is put upon the pivot e of said lever.

While an exceedingly valuable feature of my invention is that providing for maintaining the door in either of its open positions, it will be understood that the construction is a very valuable one, even though the feature just mentioned should be omitted, as might be done by omitting the depressions Z2 (Z3 of the cam and lengthening the inclined surface d of the cam, so that the door would always tend to seek the closed position. Moreover, while I have illustrated a tension device which may be readily adjusted and which is admirably adapted to its purpose, still it will be Linderstood that any suitable tensioning device may be substituted therefor. For instance, the form of the lever E may be changed, and a leaf-spring bearing upon said lever maybe provided in connection with any suitable means for adjusting the tension of said spring.

Changes in details of construction within the spirit of my invention may readily be made. Hence no undue limitation should be understood from the foregoingI detailed description.

That I regard as new, and desire to secure by Letters Patent, is* v l. The combination with a door of a cam provided at its front portion with a depression, and a yieldingly-held lever equipped with camengaging means and su pportcd on a transverse pivot near the rear edge of the door, for the purpose set forth.

2. The combination of a licor-plate eq uipped on its upper surface with a cam, a heel-plate supported thereon provided with a barrel encircling said cam, pivotal connection between the floor-plate and heel-plate located centrally with relation to said barrel, and yielding camengaging means connected with said heel-plate and engaging said cam within said barrel, for the purpose set forth.

3. The combination of a floor-plate equipped with a cam and provided with a pivotal perforation located centrally with relation to said cam, a heel-plate equipped with a pivot entering said perforation, and a yieldingly-held lever equipped with cam-engaging means, for the purpose set forth.

4. The combination of a floor-plate equipped with a cam and with a perforation located centrally with relation to said cam. a heel-plate equipped with a pivot entering said perforation, and a yieldingly-held lever pivoted on said heel-plate and equipped with a roller engaging' said cam.

5. The combination with a door of a stationary cam, a lever-support connected with said door by a transverse pivot, a roller journaled in said lever on apivot perpendicular to said first-named pivot, and means for yieldingly holding said roller against said cam, for the purpose set forth.

6. The combination with a swinging door of a stationary cam, a lever located in a mortise in said door and supported on a transverse pivot, a roller connected with said lever by a pivot perpendicular to said first-named pivot, and a spring serving yieldingly to hold said lever, for the purpose set forth.

7. The combination with a swinging door of a stationary cam, a bell-crank lever pivotally connected with the door and equipped with cam-engaging means, and a spring-held lever engaging said bell-crank lever.

8. The combination with a swinging door of a stationary cam, a lever equipped with camengaging means, and adjustable tension means for said lever, for the purpose set forth.

9. The combination of afloor-plate equipped with a cam and with a perforation located centrally with relation to said cam, said cam having front and lateral depressions, and a pivoted spring-held lever equipped with cam-engaging means, for the purpose set forth.

lO. The combination of a iioor plate equipped with a cam, a heel-plate having a vertical securing member and a bottom securing member, pivotal connections between said bottom securing member and said floor-plate, and a spring-held lever equipped with camengaging means, for the purpose set forth.

1l. The combination with a swinging door of a stationary cam, a heel-plate pivotally connected therewith, a bell-crank lever equipped with cam-engaging means and supported on said heel-plate, a lever pivoted to said heelplate and having one end engaging said bellcrank lever, and a tension device connected with the upper end of said second-named lever and accessible from the rear edge of the door, for the purpose set forth.

12. The combination of a floor plate equipped with a cam, a heel-plate pivotally connected with said floor-plate and provided with a guide, and a pivoted lever connected with said heel-plate and equipped with camengaging means, and having adjacent to said cam-engaging means a bearing in said guide, for the purpose set forth.

' JOHN E. AHLVIN.

In presence of- WALTER N. VINBERG, W. B. DAvIEs.

IOO 

